MojoExecutionException thrown when I tried to make a copy of working project: what I'm missing?

I am trying to do extremely easy thing: just copy example project from WildFly github file by file by hands to study how it works an if I can change something. So, to study. But before any changing, I meet a troubles, because I can't build and deploy my copied project!
The example works and the copy (where I changed just artifactId in pom.xml) don't!

I can't understand what I'm missing.
I do not use any IDE, try to make project with maven by command prompt.

And I actually had the same problem with previous example (which is even simplyer), I didn't recieved an exception there, but my deployment just didn't work as expected (just didn't work at all, in spite of the fact I have clearly seen it as a sucsess deployment from the administrator console wildFly).

Here is my debug log from the console (not the whole one, just last part with errors):

<dependencyManagement>
<dependencies>
<!-- Define the version of JBoss' Java EE 7 APIs we want to import.
Any dependencies from org.jboss.spec will have their version defined by this
BOM -->
<!-- JBoss distributes a complete set of Java EE 7 APIs including
a Bill of Materials (BOM). A BOM specifies the versions of a "stack" (or
a collection) of artifacts. We use this here so that we always get the correct
versions of artifacts. Here we use the jboss-javaee-7.0 stack (you can
read this as the JBoss stack of the Java EE 7 APIs). You can actually
use this stack with any version of WildFly that implements Java EE 7, not
just WildFly 10! -->
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-7.0</artifactId>
<version>${version.jboss.spec.javaee.7.0}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<dependencies>

<!-- Import the CDI API, we use provided scope as the API is included in WildFly -->
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<scope>provided</scope>
</dependency>

<!-- Import the Common Annotations API (JSR-250), we use provided scope
as the API is included in WildFly -->
<dependency>
<groupId>org.jboss.spec.javax.annotation</groupId>
<artifactId>jboss-annotations-api_1.2_spec</artifactId>
<scope>provided</scope>
</dependency>

<!-- Import the JSF API, we use provided scope as the API is included in WildFly -->
<dependency>
<groupId>org.jboss.spec.javax.faces</groupId>
<artifactId>jboss-jsf-api_2.2_spec</artifactId>
<scope>provided</scope>
</dependency>

<!-- Import the JPA API, we use provided scope as the API is included in WildFly -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<scope>provided</scope>
</dependency>

<!-- Import the JPA API, we use provided scope as the API is included in WildFly -->
<dependency>
<groupId>org.jboss.spec.javax.transaction</groupId>
<artifactId>jboss-transaction-api_1.2_spec</artifactId>
<scope>provided</scope>
</dependency>

<!-- Import the EJB API, we use provided scope as the API is included in WildFly -->
<dependency>
<groupId>org.jboss.spec.javax.ejb</groupId>
<artifactId>jboss-ejb-api_3.2_spec</artifactId>
<scope>provided</scope>
</dependency>

Fixed:
As it was adviced to me I checked server.log where I found more specific information about the failure.
In my case it was EJBUserDao already existed on server sinse I deployed the example progect (which was the same, as I told, because I tried to make e copy).
Undeploying the previous project helped to build new the same one.

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